Rust on the underbody – Is that normal?

Hello, I have been driving my RAV4 (2.2 D4D) for 3 years now (2007 year of construction, 41,000km) and am very satisfied with the car as a whole. A few weeks ago, however, I looked under the car by chance and, given the condition, I was a little scared there. The exhaust line is already so rusty that you might think the car was already 10 years old. Even my 15 years driving Toyota Corolla had no such rust marks. I once had a p aar pictures attached to the article so that you can get an impression of the condition. I mentioned the problem during the last inspection in the workshop, but this said, I should contact Toyota directly. Since the warranty period ends at the end of June 2010, I did so as soon as possible by post. A few days later, however, the answer came from Toyota: the rust would be no shortage, completely normal and therefore no guarantee case. Now I wonder if this is really normal for a 3 year old car? Does Toyota really build such bad materials in his cars? What do you think? What does this look like with your RAV? Would I be pleased with your opinion. Greetings, dalito